| /* shell.h -- The data structures used by the shell */ |
| |
| /* Copyright (C) 1993-2009 Free Software Foundation, Inc. |
| |
| This file is part of GNU Bash, the Bourne Again SHell. |
| |
| Bash is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation, either version 3 of the License, or |
| (at your option) any later version. |
| |
| Bash is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with Bash. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include "bashjmp.h" |
| |
| #include "command.h" |
| #include "syntax.h" |
| #include "general.h" |
| #include "error.h" |
| #include "variables.h" |
| #include "arrayfunc.h" |
| #include "quit.h" |
| #include "maxpath.h" |
| #include "unwind_prot.h" |
| #include "dispose_cmd.h" |
| #include "make_cmd.h" |
| #include "ocache.h" |
| #include "subst.h" |
| #include "sig.h" |
| #include "pathnames.h" |
| #include "externs.h" |
| |
| extern int EOF_Reached; |
| |
| #define NO_PIPE -1 |
| #define REDIRECT_BOTH -2 |
| |
| #define NO_VARIABLE -1 |
| |
| /* Values that can be returned by execute_command (). */ |
| #define EXECUTION_FAILURE 1 |
| #define EXECUTION_SUCCESS 0 |
| |
| /* Usage messages by builtins result in a return status of 2. */ |
| #define EX_BADUSAGE 2 |
| |
| #define EX_MISCERROR 2 |
| |
| /* Special exit statuses used by the shell, internally and externally. */ |
| #define EX_RETRYFAIL 124 |
| #define EX_WEXPCOMSUB 125 |
| #define EX_BINARY_FILE 126 |
| #define EX_NOEXEC 126 |
| #define EX_NOINPUT 126 |
| #define EX_NOTFOUND 127 |
| |
| #define EX_SHERRBASE 256 /* all special error values are > this. */ |
| |
| #define EX_BADSYNTAX 257 /* shell syntax error */ |
| #define EX_USAGE 258 /* syntax error in usage */ |
| #define EX_REDIRFAIL 259 /* redirection failed */ |
| #define EX_BADASSIGN 260 /* variable assignment error */ |
| #define EX_EXPFAIL 261 /* word expansion failed */ |
| |
| /* Flag values that control parameter pattern substitution. */ |
| #define MATCH_ANY 0x000 |
| #define MATCH_BEG 0x001 |
| #define MATCH_END 0x002 |
| |
| #define MATCH_TYPEMASK 0x003 |
| |
| #define MATCH_GLOBREP 0x010 |
| #define MATCH_QUOTED 0x020 |
| #define MATCH_STARSUB 0x040 |
| |
| /* Some needed external declarations. */ |
| extern char **shell_environment; |
| extern WORD_LIST *rest_of_args; |
| |
| /* Generalized global variables. */ |
| extern int debugging_mode; |
| extern int executing, login_shell; |
| extern int interactive, interactive_shell; |
| extern int startup_state; |
| extern int subshell_environment; |
| extern int shell_compatibility_level; |
| |
| /* Structure to pass around that holds a bitmap of file descriptors |
| to close, and the size of that structure. Used in execute_cmd.c. */ |
| struct fd_bitmap { |
| int size; |
| char *bitmap; |
| }; |
| |
| #define FD_BITMAP_SIZE 32 |
| |
| #define CTLESC '\001' |
| #define CTLNUL '\177' |
| |
| /* Information about the current user. */ |
| struct user_info { |
| uid_t uid, euid; |
| gid_t gid, egid; |
| char *user_name; |
| char *shell; /* shell from the password file */ |
| char *home_dir; |
| }; |
| |
| extern struct user_info current_user; |
| |
| /* Force gcc to not clobber X on a longjmp(). Old versions of gcc mangle |
| this badly. */ |
| #if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 8) |
| # define USE_VAR(x) ((void) &(x)) |
| #else |
| # define USE_VAR(x) |
| #endif |
| |
| /* Structure in which to save partial parsing state when doing things like |
| PROMPT_COMMAND and bash_execute_unix_command execution. */ |
| |
| typedef struct _sh_parser_state_t { |
| |
| /* parsing state */ |
| int parser_state; |
| int *token_state; |
| |
| char *token; |
| int token_buffer_size; |
| |
| /* input line state -- line number saved elsewhere */ |
| int input_line_terminator; |
| int eof_encountered; |
| |
| #if defined (HANDLE_MULTIBYTE) |
| /* Nothing right now for multibyte state, but might want something later. */ |
| #endif |
| |
| char **prompt_string_pointer; |
| |
| /* history state affecting or modified by the parser */ |
| int current_command_line_count; |
| #if defined (HISTORY) |
| int remember_on_history; |
| int history_expansion_inhibited; |
| #endif |
| |
| /* execution state possibly modified by the parser */ |
| int last_command_exit_value; |
| #if defined (ARRAY_VARS) |
| ARRAY *pipestatus; |
| #endif |
| sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; |
| |
| /* flags state affecting the parser */ |
| int expand_aliases; |
| int echo_input_at_read; |
| |
| } sh_parser_state_t; |
| |
| typedef struct _sh_input_line_state_t { |
| char *input_line; |
| int input_line_index; |
| int input_line_size; |
| int input_line_len; |
| } sh_input_line_state_t; |
| |
| /* Let's try declaring these here. */ |
| extern sh_parser_state_t *save_parser_state __P((sh_parser_state_t *)); |
| extern void restore_parser_state __P((sh_parser_state_t *)); |
| |
| extern sh_input_line_state_t *save_input_line_state __P((sh_input_line_state_t *)); |
| extern void restore_input_line_state __P((sh_input_line_state_t *)); |